OS:
Windows

Environments:
Operating System: Windows 2025 x64
Language: English (Regional Setting: English)
Processor: 11th Gen Intel(R) Core (TM) i5-1135G7 @ 2.40GHz 2.42GHz (2 processors)
OS type: 64-bit
Memory: 4 GB
LAF: manual-laf-Nimbus-Dark

Reproducible: Always

Failed on Release/Build: JDK_25_b26
Is it a Regression in JDK 25 release: N/A
[If Regression] Regression introduced in JDK 25 release/build: N/A
Test result on the last GAed release for this train: N/A
Is it a platform-specific issue: Yes. This issue only happens on Windows.

General description of the problem:
Test 'javax/swing/plaf/windows/bug4991587.java' automatically failed with message "Failed. Compilation failed: Compilation failed"

Affected test:
javax/swing/plaf/windows/bug4991587.java

Steps to reproduce:
     1. Run command:
#!/bin/sh -x

jtreg \
-verbose:summary \
-k:!printer \
-m \
-gui \
-conc:1 \
-vmoption:-Dswing.defaultlaf=javax.swing.plaf.nimbus.NimbusLookAndFeel \
-nativepath:C:/Users/user/Desktop/Reg/jdk-25-ea+26_windows-x64_bin-tests/jdk/jtreg/native \
-exclude:C:/Users/user/Desktop/Reg/open/test/jdk/ProblemList.txt \
-exclude:C:/Users/user/Desktop/Reg/closed/test/jdk/ProblemList.txt \
-testjdk:C:/Users/user/Desktop/Reg/jdk-25 \
-dir:C:/Users/user/Desktop/Reg/open/test/jdk \
-reportDir:results/JTreport \
-workDir:results/JTwork \
C:/Users/user/Desktop/Reg/open/test/jdk/:jdk_swing

     2. Run the test case: javax/swing/plaf/windows/bug4991587.java
     3. Wait for the test running
     

Expected behavior:
The test case should execute successfully

Actual behavior:
Test case automatically failed

Any non-default VM flags:
'C:\\Users\\user\\Desktop\\Reg\\jdk-25\\bin\\javac' \\
        -J-Dswing.defaultlaf=javax.swing.plaf.nimbus.NimbusLookAndFeel \\
        -J-Dtest.vm.opts=-Dswing.defaultlaf=javax.swing.plaf.nimbus.NimbusLookAndFeel \\
        -J-Dtest.tool.vm.opts=-J-Dswing.defaultlaf=javax.swing.plaf.nimbus.NimbusLookAndFeel \\
        -J-Dtest.compiler.opts= \\
        -J-Dtest.java.opts= \\
        -J-Dtest.jdk='C:\\Users\\user\\Desktop\\Reg\\jdk-25' \\
        -J-Dcompile.jdk='C:\\Users\\user\\Desktop\\Reg\\jdk-25' \\
        -J-Dtest.timeout.factor=1.0 \\
        -J-Dtest.nativepath='C:\\Users\\user\\Desktop\\Reg\\jdk-25-ea+26_windows-x64_bin-tests\\jdk\\jtreg\\native' \\
        -J-Dtest.root='C:\\Users\\user\\Desktop\\Reg\\open\\test\\jdk' \\
        -J-Dtest.name=javax/swing/plaf/windows/bug4991587.java \\
        -J-Dtest.verbose=Verbose[p=DEFAULT,f=DEFAULT,e=DEFAULT,t=false,m=false] \\
        -J-Dtest.file='C:\\Users\\user\\Desktop\\Reg\\open\\test\\jdk\\javax\\swing\\plaf\\windows\\bug4991587.java' \\
        -J-Dtest.main.class=bug4991587 \\
        -J-Dtest.src='C:\\Users\\user\\Desktop\\Reg\\open\\test\\jdk\\javax\\swing\\plaf\\windows' \\
        -J-Dtest.src.path='C:\\Users\\user\\Desktop\\Reg\\open\\test\\jdk\\javax\\swing\\plaf\\windows;C:\\Users\\user\\Desktop\\Reg\\open\\test\\jdk\\java\\awt\\regtesthelpers' \\
        -J-Dtest.classes='C:\\Users\\user\\Desktop\\Reg\\results\\JTwork\\classes\\javax\\swing\\plaf\\windows\\bug4991587.d' \\
        -J-Dtest.class.path='C:\\Users\\user\\Desktop\\Reg\\results\\JTwork\\classes\\javax\\swing\\plaf\\windows\\bug4991587.d;C:\\Users\\user\\Desktop\\Reg\\results\\JTwork\\classes\\java\\awt\\regtesthelpers' \\
        -J-Dtest.modules=java.desktop/com.sun.java.swing.plaf.windows \\
        '@C:\\Users\\user\\Desktop\\Reg\\results\\JTwork\\javax\\swing\\plaf\\windows\\bug4991587.d\\compile.0.jta'
----------System.out:(0/0)----------
----------System.err:(4/250)*----------
C:\\Users\\user\\Desktop\\Reg\\open\\test\\jdk\\javax\\swing\\plaf\\windows\\bug4991587.java:83: error: cannot inherit from final WindowsButtonUI
    static class MyButtonUI extends WindowsButtonUI {
                                    ^
1 error
result: Failed. Compilation failed: Compilation failed


test result: Failed. Compilation failed: Compilation failed